The Private Classical Capacity of a Partially Degradable Quantum Channel

Abstract

For a partially degradable (PD) channel, the channel output state can be used to simulate the degraded environment state. The quantum capacity of a PD channel has been proven to be additive. Here, we show that the private classical capacity of arbitrary dimensional PD channels is equal to the quantum capacity of the channel and also single-letterizes. We prove that higher rates of private classical communication can be achieved over a PD channel in comparison to standard degradable channels.

10 pages, Journal-ref: Physica Scripta, Special Issue on Quantum Information (2014)

References in corpus (7)

• Quantum-assisted and Quantum-based Solutions in Wireless Systems
• The structure of degradable quantum channels
• Private and Quantum Capacities of More Capable and Less Noisy Quantum Channels
• Properties of the Quantum Channel
• The Structure and Quantum Capacity of a Partially Degradable Quantum Channel
• Quantum Information Transmission over a Partially Degradable Channel
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Cited by in corpus (5)

• A Survey on Quantum Channel Capacities
• The Structure and Quantum Capacity of a Partially Degradable Quantum Channel
• Quantum Information Transmission over a Partially Degradable Channel
• Correlation Measure Equivalence in Dynamic Causal Structures of Quantum Gravity
• Theory of Quantum Gravity Information Processing